Mechanical coupler



FIG. 1 is a top, right perspective view of a mechanical coupler showing our new design;

FIG. 2 is a bottom, right perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a left side elevation view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is a cross-sectional view thereof, taken along line 9-9 of FIG. 7; and,

FIG. 10 is a cross-sectional view thereof, taken along line 10-10 of FIG. 7.

The broken lines in the drawings illustrate portions of the mechanical coupler that form no part of the claimed design. The dot-dash broken lines depict section cut indicators that form no part of the claimed design. 

CLAIM The ornamental design for a mechanical coupler, as shown and described. 